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decap:epoxy [2020/02/27 20:57] – mcmaster | decap:epoxy [2020/02/27 21:02] – [McMaster live 2019-11-10] mcmaster | ||
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Experiments trying to decap COB while keeping PCB intact | Experiments trying to decap COB while keeping PCB intact | ||
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TLDR best result | TLDR best result | ||
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Above is a compromise between PP providing the best chemical resistance and silicone providing the best seal | Above is a compromise between PP providing the best chemical resistance and silicone providing the best seal | ||
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+ | {{: | ||
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+ | Above: hardened silicone bubbles on WFNA surface | ||
Silicone only experiment | Silicone only experiment | ||
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* Interesting, | * Interesting, | ||
* Acid may eventually undermine the PCB, but eating the silicone itself came first | * Acid may eventually undermine the PCB, but eating the silicone itself came first | ||
+ | * Consider using a lot more silicone than you need to help mitigate acid splashes | ||
+ | * Maybe cover board surface with kapton? | ||
Someone also suggested I should try PTFE gasket. In the past I had tried kapton which didn't work well (acid tended to wick into kapton). Maybe PTFE would repel acid better | Someone also suggested I should try PTFE gasket. In the past I had tried kapton which didn't work well (acid tended to wick into kapton). Maybe PTFE would repel acid better | ||
+ | Reference: https:// | ||
====== Live analysis considerations ====== | ====== Live analysis considerations ====== |